This might sound funny at first, but please read one of my opinions here.

Not only does Barney teaches us to talk to strangers, he also teaches that the art of Necromancy (raising dead spirits) is all right and no harm could be done from this. No, I am not against witchcraft (love Harry Potter), but teaching that stuff to little kids that young without showing the consequences is dangerous. You might think I am a fool for beleiving in the unknown, but what you might not know can hurt you.